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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2023.0624 Advisory (icsa-23-033-03) Baicells Nova 3 February 2023 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Baicells Nova Publisher: ICS-CERT Operating System: Network Appliance Resolution: Patch/Upgrade CVE Names: CVE-2023-24508 Original Bulletin: https://us-cert.cisa.gov/ics/advisories/icsa-23-033-03 Comment: CVSS (Max): 9.8 CVE-2023-24508 (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H) CVSS Source: ICS-CERT Calculator: https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - --------------------------BEGIN INCLUDED TEXT-------------------- ICS Advisory (ICSA-23-033-03) Baicells Nova Original release date: February 02, 2023 Legal Notice All information products included in https://us-cert.cisa.gov/ics are provided "as is" for informational purposes only. The Department of Homeland Security (DHS) does not provide any warranties of any kind regarding any information contained within. DHS does not endorse any commercial product or service, referenced in this product or otherwise. Further dissemination of this product is governed by the Traffic Light Protocol (TLP) marking in the header. For more information about TLP, see https://us-cert.cisa.gov/tlp/ . 1. EXECUTIVE SUMMARY o CVSS v3 9.8 o ATTENTION: Exploitable remotely/low attack complexity o Vendor: Baicells Technologies o Equipment: Nova o Vulnerability: Command Injection 2. RISK EVALUATION Successful exploitation of this vulnerability could allow an attacker to execute arbitrary commands. 3. TECHNICAL DETAILS 3.1 AFFECTED PRODUCTS Baicells reports this vulnerability affects the following Nova LTE TDD eNodeB devices with firmware through RTS/RTD 3.6.6: o Nova 227 o Nova 233 o Nova 243 o Nova 246 3.2 VULNERABILITY OVERVIEW 3.2.1 COMMAND INJECTION CWE-77 Baicells Nova 227, Nova 233, Nova 243 LTE TDD eNodeB devices and Nova 246 with firmware through RTS/RTD 3.6.6 are vulnerable to remote shell code exploitation via HTTP command injections. Commands are executed using pre-login execution and executed with root permissions. CVE-2023-24508 has been assigned to this vulnerability. A CVSS v3 base score of 9.8 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/ C:H/I:H/A:H ). 3.3 BACKGROUND o CRITICAL INFRASTRUCTURE SECTORS: Communications o COUNTRIES/AREAS DEPLOYED: Worldwide o COMPANY HEADQUARTERS LOCATION: United States 3.4 RESEARCHER Rustam Amin reported this vulnerability to CISA through VINCE . 4. MITIGATIONS Baicells resolved this vulnerability in firmware version 3.7.11.3 and later. Baicells recommends all users currently running an earlier version of RTS/RTD upgrade their devices to the 3.7.11.6 firmware. Firmware can be downloaded from the Baicells community page or upgraded via OMC. Baicells published a security vulnerability notice for this issue CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. Specifically, users should: o Minimize network exposure for all control system devices and/or systems, and ensure they are not accessible from the Internet . o Locate control system networks and remote devices behind firewalls and isolate them from business networks. o When remote access is required, use secure methods, such as Virtual Private Networks (VPNs), recognizing VPNs may have vulnerabilities and should be updated to the most current version available. Also recognize VPN is only as secure as its connected devices. CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures. CISA also provides a section for control systems security recommended practices on the ICS webpage at cisa.gov/ics . Several CISA products detailing cyber defense best practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies . Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov/ics in the technical information paper, ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies . Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents. No known public exploits specifically target this vulnerability. This vulnerability is exploitable remotely. This vulnerability has a low attack complexity. For any questions related to this report, please contact the CISA at: Email: CISAservicedesk@cisa.dhs.gov Toll Free: 1-888-282-0870 CISA continuously strives to improve its products and services. You can help by choosing one of the links below to provide feedback about this product. - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: https://www.auscert.org.au/bulletins/ =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: https://auscert.org.au/gpg-key/ iQIVAwUBY9xhq8kNZI30y1K9AQhd3A/8C705Tl/WFHe3MFVGNs4b/ybZWlWE5qY5 bWn58zrJVZH8sbmoKiPYW7TKINm1O5u0Ux0flttxQC/TsjLktGEyunedzS/nrX1a +onNjPC+7UtZqp7tA7SASWuXOKnglqi6t6F3VOZ8CBK5+48p0qPlj9fQHPBG04lG 2AY4SNR2+4pOkUqIW1R74FPdj7DA5tYY8gpsy0LReLz3q6c87hQGXNDmXL8Yn871 PjwH3OtoFua8o7kfi0T6w1ouQwdIbgPvt06wnYwAN8Jj0qhqs8wn+uFa3+loWaEO Cfk6wcTnr3+35fW9MaGQEh90Tuoh6oI5X3wGL7hCIHPdx/PgLMhfg48D/n/Q7YWk +3IYcDQUF7IPMIn45JT3asJ77u3oR65gyzffAj0wrn826HgxK7Ro4goev4mp+tg2 9xvNC6Hm5A9N8TpHCT83WbmTctUiWgUrG1XNaLojROrKDKLV4CDhrFgcZQnoO8uB GUjOVdwp0C9E2fQ93nmUHx3Jrrlnh/NuX9Euu69sdamVgDUWuERXwWRlVZ71b6Nm 0cDpduISNfDseFumJV7rCgStczABqtPHzsgMBCAG1MbNzzTFFspA6uCU/X0bb9y8 HxrCkrzNLy1bT/VVlkjYYMY2k7yHFQN6QQNlYvKk7awcJJHUrK0Eyos3v5toR4bG CzETAAcYtPQ= =Vcsa -----END PGP SIGNATURE-----